Furnace for the treatment of refractory ores.



N' 5.'86, 229. PATENTED AUG. 6, 1907. w. P. WYNNE & J. H. GRANT. if

' FURNACE OR THE. TREATMENT OF RBBRAUTQRY (mm I 'uuonmn 21mm mm. 19, 19 04. v

IZIIIQIIIIQIILIE W mm QAW jaw .30 is an enlarged plan oftheore distributer.

. rinrrn SATES WALTER PALMER YWYNNE Ann JAMESH FURNACE soa rnzp.trnna'rirmnit dositnr'aaerioitir cans. l

To all whom it may concern: I

Be it known that we, lVALTEIt PALMER WYNNE and 3 Jam-1s HENRY GRANT, both subjects of the King of Great Britain, residing at No. 11 Australian Mutual Provident Buildings, Lydiard street, Ballarat, in the State of Victoria, Australia, consulting engineers, have invented an Improved Furnace for the Treatment of Antimony-Gold. Ores and other Refractory Ores, of

which the following is' a Specification.

This invention relates toa furnace for the treatment of antimony-gold ores pyritcs and other refractory ores, wherein the antimony is Volatilized and driven from the ore with other fumes and collected in the form of oxid. of antimony in a surface condenser, and

the object in view is to"instantaneously cool the ore after passing through the flames of the furnace andso prpventsaid ore from sintering or fusing intoa mass of clinkers, a condition which would be unsuitable for further treatment-and fatal to the extraction of the gold. To this end the hcarths are hollow and are continuously supplied, by cold fluid-hence the particles oforc falling thereon are instantly cooled below the fusing point as. they accumulate and so can be gradually moved forward by the rabbles from one hearth to the other. 5 a

Theginvention is illustrated by the annexed drawings I Figure 1 is a vertical section of the furnace with parts in elevation and the condenser omitted. Fig. 2

Referring to these drawings it will be observed that there are three furnaces A, B, 0, situate at different elevations and so arranged that the material is fed successively from the upper A to the middle B and to the lower 0 by means of rabbles.

The hearths 1 and 2 are formed of hollow iron and are continuously supplied by cold fluid and one end of the finishing hearth 3 is similarly constructed, but the discharge end is kept at a temperature about three times as greatas that of the rear or fluid cooled end.

The powdered ore is first fed from a hopper 4 on to. an inclined reciprocating fluid cooled .distributer 5 mountedona hollow shaft above the hearth 1 of the furnace A said distributor being operated by an eccentrio 6 (Fig. 2). Asthe ore falls from the distributer it is blown by an air blast 60 so that it falls in the form of a spray through the flat sheets of flame emitted from two oil or gas burners D which produce a heat at about 450 degrees Fahrenheit and drive-off the volatile constitucnts of'the ore which are carried away by a flue 7 to the usual surface condenser (not shown).

Although the heat of the furnace is much above the fusing point of antimony, fusion does not take placeas each particle when passing through the flames is separat. and consequently surrounded by air, and the obtreatment.

snar ens mien ALLAEAT; vro' any,

ers Patent.

"(M l sa ug, 6911907- ject of the fluid cooled hearth is'to instantly cool each particle of the ore below its fusing point so that whelf said particles accumulate 'on' the hearth they may not sinter or fuse into a'mass'unsuitable for further.

The burners mayhave a baffle plate 17 in front with horizontal slits 18 therein for the emission of the flames, as shown by dotted lines in Fig. 1.

The oreis gradually moved forward along to the end of the hearthl by means of reciprocating fluid cooled rabbles 24 and falls down a chute 19 between rotating grinding rollers 20 and passes to another furnace B situate beneath and in advance of the furnace A. The grinding rollers 20 are kept in contact with each other by a spring 21 which will yield under undue pressure, z and they are operated by spur gearing as shown in Fig. 1. The rabbles are reciprocated by an eccentric or the like connected thereto by a pipe 25 and ports 28 are provided in the sides of the furnace for inspection or cleaning purposes.

Each hcarthhas a similar rabble and the ore is fed from the second hearth B through a chute 35 to grinding rollers 36 on to the fluid cooled end of the finishing hearth 3. This latter hearth is comparatively long and is heated for the most part to ahigh temperature by oil or other burnersST having a perforated baffle plate 38 in the front thereof or by any suitable furnace.

The hearths 2 and 3 of the furnaces B and C have independent flues 39 and 40 respectively leading with the fiue 7 of. the furnace A to the surface condenser where the volatile fumes are converted into oxid of antimony. I I Thefiuid cooled hearths herein described must not be confused with the water jackets of an ordinary smelting furnace as the former are employed for the instantaneous cooling of the antimony ore while the object of the latter is to protect the sides of the furnace from the intense heat necessary for the smelting of ores such as silver, lead or copper.

Having now particularly described and ascertained the nature of our said invention and in what. manner the same is to be performed we declare that what we claim is: I i

1. An improved furnace for the treatment of antimony gold ores and other refractory ores comprising a plurality of furnaces situated at different elevations and providcdwith fluid cooled hcarths and separate fines and menus for feeding the material successively from one furhacc to the other substantially as set forth.

2. In a furnace for'the treatment of antimony gold ores and other refractory ores. a fluidcooled reciprocating ore distributor situated above the burners of the furnace and an air blast between said burners and-said distributor in combination with a fluid cooled hearth substantially as set forth.

3. improved furnace for the treatment of antimony gold ore and other refractory ores comprising a plurality of a hollow 'fluidcdoled reciprocating distributer an.a1r bias fnrna'ces with fluid c ooled hearths situate at differ'eht elevations; the tbp one'having a feed hppper abbve thehearth' In testimtmy Whereo'fwe havei hegeunfco' set our hands honeath the latte: and two burners, a reciprocating-nbbl'e, in presence of sn hscribing witnesses. a chute at the end of the hearth a pair of grindingrbller's; 1 I Y through which the .material falls to the iniddle furnace" similarly constructed, aflnishihg hearth beneath'which isv cooled at its.rea1'. endand provided .with'a similar rabbleQ and with a burner at itsdiseharge end and aperforated bafiie plate in the .front thereof, separate 'fiues leading WALTER" ALMER- .WY NE, JAMES HENRY'GRANfJJ.

tron! taci fuiiiti to a s'ni'fdce e0nenser substantially as. I 

